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Monday, April 27, 2020 | History

3 edition of acute mammalian toxicity of rare earth nitrates and oxides found in the catalog.

acute mammalian toxicity of rare earth nitrates and oxides

David W. Bruce

acute mammalian toxicity of rare earth nitrates and oxides

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Published by USAF School of Aerospace Medicine, Aerospace Medical Division in Brooks Air Force Base, Tex .
Written in English

    Subjects:
  • Rare earth nitrates -- Toxicology,
  • Rare earths -- Toxicology

  • Edition Notes

    Statement[prepared at the USAF Radiation Laboratory, University of Chicago, by David W. Bruce, Bernard E. Hietbrink, Kenneth P. DuBois.
    SeriesTechnical documentary report -- no. 63-38., USAFSAM-TDR -- 63-38.
    ContributionsHietbrink, Bernard E., DuBois, Kenneth P., USAF Radiation Laboratory., USAF School of Aerospace Medicine.
    The Physical Object
    Paginationiii, 6 p. ;
    ID Numbers
    Open LibraryOL17614529M
    OCLC/WorldCa52934118

    Although vegetables are seldom a source of acute toxicity, they account for >70% of the nitrates in a typical human diet. Cauliflower, spinach, collard greens, broccoli, and root vegetables have a naturally greater nitrate content than other plant foods do. The remainder of the nitrate in. Guidance Document Nitrate Treatment and Remediation for Small Water Systems Publication Number (Revised) If you need this publication in an alternative format, call (TDD/TTY call ).File Size: 1MB. Numerous studies have reported that the early life stages of fish and invertebrates were more sensitive to toxicants than the adult organisms (Herkovits et al. , Schmieder et al. , Hutchinson et al. , Mohammed et al. ).Schmieder et al. () reported that for medake, embryo-larval stages showed 50% mortality when 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) Cited by: “Adsorption of Fluo-ride onto Mixed Rare Earth Oxides,” Separation and Pu-rification Technology, [72] Ramanjaneyulu, V., Jaipal, M., Yasovardhan, N. and Sharada, S. (). Kinetic studies on removal of fluoride from drinking water by .


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acute mammalian toxicity of rare earth nitrates and oxides by David W. Bruce Download PDF EPUB FB2

Acute toxicity studies were conducted on the rare earth nitrates and oxides. The approximate LD 50 values for the rare earth nitrates given intraperitoneally to mice ranged from mg/kg to mg/kg, and for rats the values ranged from mg/kg to mg/kg.

Rats were able to tolerate mg/kg of the rare earth oxides given orally or by the intraperitoneal by: Get this from a library.

The acute mammalian toxicity of rare earth nitrates and oxides. [David W Bruce; Bernard E Hietbrink; Kenneth P DuBois; USAF School of Aerospace Medicine.] -- Results of acute toxicity studies on rare earth nitrates indicate that their acute toxicity is highly dependent on the route of administration.

The nitrate salts were moderately toxic when given. @article{osti_, title = {THE ACUTE MAMMALIAN TOXICITY OF RARE EARTH NITRATES AND OXIDES. Technical Report}, author = {None}, abstractNote = {Results of acute toxicity studies on rare earth nitrates indicate that their acute toxicity is highly dependent on the route of administration.

The nitrate salts were moderately toxic when given intraperitoneally to. toxicol appl pharmacol. nov; the acute mammalian toxicity of rare earth nitrates and oxides.

bruce dw, hietbrink be, dubois by: @article{osti_, title = {Relative oral efficacy and acute toxicity of hydroxypyridinone iron chelators in mice}, author = {Porter, J.B. and Morgan, J. and Hoyes, K.P. and Burke, L.C. and Huehns, E.R. and Hider, R.C.}, abstractNote = {The relationship between the oral efficacy and the acute toxicity of hydroxypyridinone iron chelators has been investigated to clarify structure.

Only % of the rare-earth element content is europium. The second large source for rare-earth elements between and its closure in the late s was the Mountain Pass rare earth mine.

The bastnäsite mined there is especially rich in the light rare-earth elements (La-Gd, Sc, and Y) and contains only % of ciation: /jʊəˈroʊpiəm/ ​(yoor-OH-pee-əm).

Erbium is a chemical element with the symbol Er and atomic number A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden, from which it got its name.

Erbium's principal uses involve its pink-colored Er 3+ Pronunciation: /ˈɜːrbiəm/ ​(UR-bee-əm). NITRATE TOXICITY The primary nutrient form of nitrogen in most soils is nitrate which is a normal compound found in many plants.

It can be found normally in various grazing and forage crops, soil, and water. Under certain circumstances, nitrates can accumulate to abnormally high levels and become very toxic to ruminants. Many species are susceptible to nitrate and nitrite poisoning, but cattle are affected most frequently.

Ruminants are especially vulnerable because the ruminal flora reduces nitrate to ammonia, with nitrite (~10 times more toxic than nitrate) as an intermediate product. Nitrate reduction (and nitrite production) occurs in the cecum of equids. Europium (Template:IPAc-en Template:Respell) is a chemical element with the symbol Eu and atomic number It is named after the continent of Europe.

It is a moderately hard silvery metal which readily oxidizes in air and water. Being a typical member of the lanthanide series, europium usually assumes the oxidation state+3, but the oxidation state+2 is also common: all europium.

Abstract. Scandium and yttrium, like all other ions, complexes, or compounds, are toxic in excess. These and other elements of group IIIA are hard metals that bind weakly to organic ligands and may compete for the binding sites of some other : Chaim T.

Horovitz. Rare earths: salts and solutions. Rare earth salts manufactured by Treibacher Industrie AG are availabe in pure or mixed form and in many variations to choose from. We also produce customized rare earth solutions for application-specific use like investment casting, catalysts or electro-ceramics.

Products. Introduction. Heavy metals are defined as metallic elements that have a relatively high density compared to water [].With the assumption that heaviness and toxicity are inter-related, heavy metals also include metalloids, such as arsenic, that are able to induce toxicity at low level of exposure [].In recent years, there has been an increasing ecological and global public health Cited by:   G.

Melville and R. Riess, Nitrates and Oxides of Rare-Earth Elements [Russian translation], Arch. of Environmental Health., 2 () p. – Google Scholar Download referencesCited by: 5.

Rare-earth nitrate and oxide salts were given to rats by intraperitoneal injection and by subcutaneous implantation. Groups of these animals were given r. The study was conducted to investigate the effects of maternal supplementation with rare earth elements (REEs) on sows and their offspring.

During late gestation, multiparous sows were divided randomly into the control group (Basal diet) and REE-G group (Basal diet supplemented with mg REE/kg). After delivery, REE-G group was further divided into two groups: REE-L Author: Yi Xiong, Jiaman Pang, Liangkang Lv, Yujun Wu, Na Li, Shimeng Huang, Zhi Feng, Ying Ren, Junjun Wang.

Nitrates and nitrites are chemicals used in fertilizers, in rodenticides (to kill rodents), and as food preservatives (). Nitrates and nitrites come in various forms, but when dried are typically a white or crystalline powder. Nitrate (NO3-) and nitrite (NO 2-) are also naturally-occurring compounds that are aFile Size: KB.

acute oral toxicity of nitrate to laboratory animals is low to moderate. LD50 values of – mg of sodium nitrate per kg of body weight have been reported.

D. Jiayu, X. Yuan, H. Pengde, Z. QituEffects of rare earth oxides on dielectric properties of Y 2 Ti 2 O 7 series ceramics J. Rare Earths, 28 (), pp.

Google ScholarCited by:   Nitrates can react with amino acids to form nitrosamines, which have been reported to cause cancer in animals [Bruning-Fann and Kaneene ]. Elevated risk of non-Hodgkin's lymphoma [Ward et al. ] and cancers of the esophagus, nasopharynx, bladder, colon, prostate and thyroid have been reported [Cantor ; Eichholzer and Gutzwiller Final Report on Acute and Chronic Toxicity of Nitrate, Nitrite, Boron, Manganese, Fluoride, Chloride and Sulfate on Several Aquatic Animal Species [U.S.

Environmental Protection Agency] on *FREE* shipping on qualifying offers. Final Report on Acute and Chronic Toxicity of Nitrate, Nitrite, Boron, Manganese, Fluoride, Chloride and Sulfate on Several. Europium (/ j ʊ ˈ r oʊ p i ə m / ew-ROH-pee-əm) is a chemical element with the symbol Eu and atomic number It is named after the continent of is a moderately hard silvery metal which readily oxidizes in air and a typical member of the lanthanide series, europium usually assumes the oxidation state +3, but the oxidation state +2 is also common: all Group, period, block: n/a, 6, f.

The widespread use of nitrate fertilizers increases the risk of well-water contami nation in rural areas. This monograph is one in a series of self-instructional publications designed to increase the primary care provider’s knowledge of hazardous substances in the environment and to aid in.

The hereditary types are rare and usually show up in the first days of life, so I will not discuss them here. Most cases of reported methemoglobinemia are drug-induced, the major pharmaceutical culprits being benzocaine (a topical anesthetic often found in teething gels) and dapsone (an oral antibiotic used to treat certain skin conditions) [1].Cited by: 1.

Acute synergistic toxicity and hepatic necrosis following oral administration of sodium nitrite and secondary amines to mice. Cancer Res 31(9)­ Aschebrook-Kilfoy B, Cross AJ, Stolzenberg-Solomon RZ, et al. Pancreatic cancer and exposure to dietary nitrate and nitrite in the NIH-AARP Diet and Health Study.

Rare Earth Elements in Human and Environmental Health: At the Crossroads Between Toxicity and Safety Pagano, Giovanni This book presents the multifaceted aspects of rare earth elements (REEs), focusing on both their potential benefits and adverse health effects. forms that are incapable of carrying oxygen.

Nitrate toxicity to aquatic animals increases with increasing nitrate con-centrations and exposure times. In contrast, nitrate toxicity may decrease with increasing body size, water salinity, and environmental adaptation.

Freshwater animals appear to be more sensitive to nitrate than marine animals. Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF.

Visit to get more information about this book, to buy it in print, or to download it as a free PDF. Toxicity of nitrate related compounds causes two syndromes. The Acute State (syndrome) is when a single very high dose was consumed leading to rapid onset of symptoms such as loss in co-ordination, distress, laboured breathing, excitability, cyanosis, muscular weakness, and collapse leading to death, in a few hours to one day after ingestion.

The acute toxicity reported on this page is of the pure chemical ingredient only and may not reflect the acute toxicity of individual pesticide products. To view acute toxicity of individual products, click on 'View Products' link in the 'Chemical Identification' section above.

The answer to this seeming contradiction is our body’s ability to process nitrates. The Healthy Route to Nitrite Processing. Certain vegetables contain nitrates, which break down into nitrites when eaten.

Nitrites are necessary and life-enhancing, providing the nitric oxide we need to keep our blood vessels dilated, and minimize risk of high. Cerium is the most abundant of rare-earth metals found in the Earth’s crust. Several Ce-carbonate, -phosphate, -silicate, and -(hydr)oxide minerals have been historically mined and processed for pharmaceutical uses and industrial applications.

Of all Ce minerals, cerium dioxide has received much attention in the global nanotechnology market due to their useful Cited by: The toxicity of nitrite to rainbow trout is pH-dependent within the range considered acceptable to most freshwater aquatic life (pH ). Both of the nitrite species, NO2(-) and HNO2, are toxic.

It is recommended that nitrite criteria to protect freshwater aquatic life be based on total nitrite, and that such criteria reflect the pH dependence of nitrite toxicity. This book is prepared to give information on the chemistry and toxicity of nitrites. Several factors can affect a person’s health like exposure to certain environmental chemicals, particularly to NO3− and NO2−.

Several factors including drugs and certain chemical exposures can all be listed as risk factors in high exposure to NO3−/NO2−.Author: Pinar Erkekoglu, Terken Baydar.

EPA R November Final Report on Acute and Chronic Toxicity of Nitrate, Nitrite, Boron, Manganese, Fluoride, Chloride and Sulfate to Several Aquatic Animal Species Prepared for: United States Environmental Protection Agency Office of Science and Technology Health and Ecological Criteria Division and U.S.

EPA, Region 5 Water Division EPA Contract:. Nitrite toxicity to fish varies considerably and depends on a large number of external and internal factors.

Among the most important ones are water quality (e.g. pH, temperature, cation, anion and oxygen concentration), length of exposure, fish species, fish size and age, and individual fish susceptibility. Chloride concentration in water isFile Size: KB. Nitrates have generally demonstrated a low acute oral toxicity in rats, mice and rabbits but may be moderately toxic in man, producing the blood disorder methaemoglobmaemia.

Ingestion of a nitrate/nitrite mixture exacerbated the dermatitis of some patients, and the ingestion of nitrate has caused pains in the joints of two individuals. Nitrite complexes of the rare earth elements† Nitrogen oxides are privileged ligands in the inorganic chem-istry of the actinides and the rare earth elements (REEs), with nitric media being utilized at both ends of the life cycle of these strategic.

Nitrates could go up to 40ppm and not cause real harm in most fish, if those levels are present for a very short time -say you couldn't do your scheduled water change for being sick. That said, you happen to keep one of the most delicate species in freshwater: Discus. Their tolerance to Nitrates might be lower than most fishes.

(quality criteria for water, july ) pb see appendix c for methodology HALOETHERS CRITERIA: Aquatic Life The available data for haloethers indicate that acute and chronic toxicity to freshwater aquatic life occurs at concentrations as low as 3 60 and ug/L, respectively, and would occur at lower concentrations among species.

Rare earth nitrate Hi ^_^ I want to preparation rare earth nitrate from theirs oxides such as Nd2O3, Gd2O3, Tm2O3 I know I must use HNO3 for this but I don't know about the experimental method and can not find the .The clinical signs of grass tetany and milk fever are often similar, and probably the triggering mechanisms are also similar.

Without exception, most researchers have observed that clinical signs of grass tetany rarely occur unless affected animals are high producing and being fed a ration high, or excessive, in protein which includes non-protein nitrogenous compounds.Nitrates and nitrites are nitrogen-oxygen chemical units that naturally occur in soil, water, and some foods.

When taken into the body by drinking water and through other dietary sources, nitrate and nitrite can react with amines and amides to form N-nitroso compounds (NOC), which are known to cause cancer in animals and may cause cancer in humans.